Beyond the Gutter - a Panoramic Book.

I'm planning on self-publishing a book this Spring. It would contain reproductions of contact prints at actual size. The 8X10 pt/pd prints should not be a problem - a 10X12 book size would be fine. But what of 7X17 prints? I don't want to print across the gutter, and would prefer a fold-out format rather than some extra-wide size book. Do any of the self-publishing companies (eg, LuLu, Blurb, iPhoto) handle fold-outs?